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CVE-2026-21098 Samsung Mobile CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-09-09T05:17:22.023Z and has not been modified since then. The NVD entry is currently Analyzed. This CVE-2026-21098 vulnerability involves improper access control in Link to Windows on Samsung Android devices prior to SMR Sep-2026 Release 1. Local attackers can establish a connection with the PC without proper user interaction. Defenders should verify device configurations, assess exposure, and prioritize patching. The vulnerability allows unauthorized connections, potentially leading to access issues. Official CVE Program record and NIST NVD detail page provide source-specific

Vendor
Samsung Mobile
Product
Samsung Mobile Devices
CVSS
MEDIUM 6.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-09
Original CVE updated
2026-09-28
Advisory published
2026-09-09
Advisory updated
2026-09-28

Who should care

Defenders responsible for managing Samsung Android devices, particularly those using Link to Windows, should assess their exposure to local attackers and verify if their devices are running vulnerable versions.

Why it matters

CVE-2026-21098 is a medium-severity vulnerability in Link to Windows on Samsung Android devices. Defenders should assess exposure, verify device configurations, and prioritize patching to prevent local attackers from establishing unauthorized connections.

  • Local attackers may establish unauthorized connections to PCs
  • Defenders need to verify device configurations and user interaction requirements
  • Vulnerable versions require immediate attention and potential patching
  • Exposure assessment is crucial for defenders managing Samsung Android devices

Technical summary

The vulnerability is an improper access control issue in Link to Windows on Samsung Android devices prior to SMR Sep-2026 Release 1. This allows local attackers to establish a connection with the PC without proper user interaction, potentially leading to unauthorized access.

Defensive priority

Defenders should prioritize verifying if their Samsung Android devices are running Link to Windows versions prior to SMR Sep-2026 Release 1 and assess exposure to local attackers.

Recommended defensive actions

  • Verify if Samsung Android devices are running Link to Windows versions prior to SMR Sep-2026 Release 1
  • Assess exposure to local attackers
  • Review device configurations for proper user interaction requirements
  • Apply SMR Sep-2026 Release 1 or later when available

Evidence notes

The CVE description notes an improper access control vulnerability in Link to Windows prior to SMR Sep-2026 Release 1 allows local attackers to establish a connection with the PC without proper user interaction. Official CVE Program record and NIST NVD detail page provide source-specific vulnerability assessment.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-21098 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-21098

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-21098 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-21098

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.